Antenna Driving Device Power Supply Circuit Feedback Control
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Solution Overview
Problem
Conventional antenna driving devices face challenges in reducing current consumption when the antenna is halted while maintaining stability and efficiently switching between sine wave and pulse wave driving methods to suit operating situations, leading to issues with harmonic wave noise and power consumption.
Innovation Solution
The antenna driving device incorporates a logic circuit that controls the power supply circuit to temporarily disable current feedback control and perform voltage feedback control when restarting the antenna, and switches between sine wave and pulse wave driving using a linear amplifier and gate drivers, allowing for variable control of the output feedback system to maintain constant voltage or current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current feedback control is continuously operated to maintain stability of antenna driving, then antenna driving stability is improved, but current consumption increases when the antenna is halted
Solution Approach 1:
The power supply circuit operates in periodic cycles, alternating between operating states (antenna driven) and stopping states (antenna halted). During stopping states, the power supply circuit ceases operation to reduce current consumption, while during operating states it resumes to maintain antenna driving stability when needed.
Solution Approach 2:
Before halting the antenna drive, the power supply circuit performs preliminary actions to maintain stable operating conditions. When restarting, it uses feedback control to adjust the output voltage and prevent overshoot, ensuring stable antenna driving resumes without excessive current consumption.
2Object-generated harmful factors
If sine wave driving method is used to reduce harmonic wave noise, then harmonic wave noise is reduced, but power consumption and heat generation increase
Solution Approach 1:
The antenna driving device dynamically switches between sine wave driving method and pulse wave driving method based on operating conditions. The logic circuit selects the appropriate driving method to balance harmonic wave noise reduction and power consumption, adapting to different operational requirements.
Solution Approach 2:
The device changes the driving waveform parameter from sine wave to pulse wave depending on the operating situation. Pulse wave driving is used when power consumption needs to be reduced, while sine wave driving is used when harmonic wave noise needs to be minimized, allowing flexible parameter adjustment.
3Measurement precision
If current feedback control is used to accurately control radio wave transmission range, then transmission range control accuracy is improved, but system startup time increases
Solution Approach 1:
Before implementing current feedback control, the power supply circuit performs preliminary voltage adjustment using feedback control to set the output voltage to an appropriate level. This preliminary action prevents current overshoot when current feedback control starts, enabling faster and more stable startup.
Solution Approach 2:
The device uses feedback control in the power supply circuit to monitor and adjust the output voltage based on the actual operating conditions. This feedback mechanism allows accurate control of the radio wave transmission range by maintaining appropriate driving current levels while reducing startup time through intelligent voltage adjustment.
Data Source
AI summary
An antenna driving device includes an antenna driving circuit arranged to generate driving current of a transmission antenna, a power supply circuit arranged to generate an output voltage from an input voltage so as to supply the output voltage to the antenna driving circuit, and a logic circuit arranged to control the antenna driving circuit and the power supply circuit. The power supply circuit has a function of temporarily disabling current feedback control so as to perform voltage feedback control using a reference value just before halting the drive of the transmission antenna when the power supply circuit restarts to drive the transmission antenna, or has a function of performing variable control of a reference value for current feedback control in accordance with a rising edge of the driving current when the power supply circuit restarts to drive the transmission antenna.